โ Black
0
Board 3 + Cap 0
โ White
0
Board 3 + Cap 0
๐ง Developer Mode Active
RSG-v59
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You win if your total points (stones on the board + captured stones) exceed your opponent's.
The board is shaped like a six-pointed star with 37 cells. The purple cell in the center is a special cell called the Core Point (CP).
Stones can only be placed where they can sandwich opponent stones. There are 6 possible directions. Sandwiched stones are flipped to your color.
A special rule not in Reversi. If you completely surround opponent stones with yours, they are removed from the board. Captured stones are added to your points. Emptied cells can be played on again.
However, opponent stones already surrounded before your move cannot be captured by an unrelated move. Only a surround newly completed by your current move triggers a capture.
The purple cell at the center. CP is a special cell that can become either color. When sandwiching through CP, you must call "Black" or "White" right after placing. The call color changes the flip result.
The game ends when any of the following occurs.
1. All 37 cells are filled
2. Neither player can make a move
3. Ko (repeated board position) makes the game unplayable
Stones on the board + Captured stones = Total points
The player with more total points wins.
For detailed rules (CP participation, Ko details, promotion exams, etc.)
Tap a date on the calendar to start a game.
Beating the CPU clears that day, and a green mark appears on the calendar.
You can also challenge past dates, so don't worry about missed days! Go back and try them.
Clear the entire month to earn a trophy. ๐
CPU level and other settings can be changed on the game setup screen after selecting a date.
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ReverStarGo is a two-player board game played on a six-pointed star board. It combines Reversi's "sandwich and flip" with Go's "surround and capture" into an entirely new strategy game.
โ Placing Stones
You must place your stone where it can sandwich at least one opponent stone. If you have no valid moves, your turn is passed.
โก Flipping
All sandwiched opponent stones are flipped to your color.
โข Surround & Capture
Completely surrounding opponent stones with yours captures them, adding to your points. Captured cells become available again.
Unlike Go, the board edge (wall) does NOT count as part of a surrounding. You must surround entirely with your own stones.
โฃ Pre-existing Surrounds Are Protected
Opponent stones already surrounded before your move cannot be captured by an unrelated move. Only a surround newly completed by your current move triggers a capture.
CP is the special cell at the center of the board.
โ Call Required
When you play a move that flanks through the CP, you must call "Black" or "White" immediately after placing, before flipping.
โก Treated as Called Color
The CP is treated as containing a stone of the called color for the rest of the game.
โข Capturing the CP
The CP can be captured by surrounding, just like any other stone. Surrounding the CP alone also counts.
The game ends when any of the following conditions is met.
Each player's score = stones on the board + stones captured by surrounding. The higher score wins.
If scores are tied, the player with more captured stones wins.
If both totals and captures are equal, the game is a draw.
The ko rule prevents infinite repetition of the same board position.
โ Basic Rule
You cannot play a move that returns the board to the exact state one turn ago.
Furthermore, you cannot play a move that returns the board to any previously-seen state.
โก Exception
Only when there is no other place you can play, you may play a move that returns the board to a previous state.
โข After Exception
Right after an exception is applied, the opponent also cannot play a move that repeats a previous state.
โฃ Game End
If both players can only play moves that repeat previous states, the game ends and the winner is determined by the total score at that moment.
โค Visual Indicators
โ Yellow Dot โ Marks a placeable cell (regardless of background color).
โ Orange background + white border โ Placeable, but only one CP call color is allowed (other is ko-restricted).
โ Red background + white border โ Blocked by ko. Normally cannot be played.
โ Red + white border + yellow dot โ Exception: only red remains, so placing is allowed.
โ A special series of consecutive matches to unlock the next CPU level. Separate from the Daily Challenge.
โ When It Appears
When you reach a specific rank, the right to challenge for promotion is automatically triggered.
โก Basic Rules
โข Failing Is OK
You can retry as many times as you want. Keep challenging until you're satisfied.
Right after capturing by surrounding, if the opponent immediately places back at the same spot, the same board state would repeat forever.
To prevent this, you cannot make a move that returns the board to the exact same position as one move ago.
After placing a stone elsewhere first, you can place there again.
๐ก How hints work:
โ Yellow dot = Placeable cell (shown on any background)
โ Orange background + white border = CP call restricted (placeable)
โ Red background + white border = Blocked by ko (exception placement if yellow dot also shown)
It's Black's turn next.
Tap the screen to continue
Which color do you call for C.P.?
No available moves
โ If you quit the game,
it counts as a loss.
Are you sure?
๐ง Developer Menu
Rank Up!
What is a Rank-Up Match?
A special series of matches to unlock the next rank (and new level). Can be attempted separately from the Daily Challenge.
Promotion Match List
Wood โ 
Stone: Best of 3 (first to 2 wins) / Unlock Lv.2
Steel โ 
Bronze: Best of 5 (first to 3 wins) / Unlock Lv.3
Gold โ 
Platinum: Best of 7 (first to 4 wins) / Unlock Lv.4
Garnet โ 
Topaz: Best of 7 (first to 4 wins) / Unlock Lv.5
Emerald โ 
Diamond: Best of 7 (first to 4 wins) / Unlock MAX
Master โ 
Legend: Best of 7 (first to 4 wins)
Legend โ 
Grand Master: Best of 15 (first to 8 wins) / Unlock FINAL
Demigod โ 
God: Best of 11 (first to 6 wins)
God โ 
Zeus: Best of 21 (first to 11 wins)
Basic Rules
- You must play all matches consecutively without interruption
- Navigating to another screen mid-match results in failure
- Black/White sides alternate automatically each game
- For best-of-7 from Platinum to Legend, 20 career wins also qualify for promotion
Even if you fail, you can retry as many times as you want!
* Can also be started from the game setup screen later